Control apparatus



1949- R. R. STEVENS CONTROL APPARATUS Filed Aug. 50, 1944 Q nm @N @QQQ0Q g INVENTOR. B Roy 1?. Stevens ATTORNEY Patented Aug. 2, 1949 UNITEDSTATES PATENT OFFICE 2,477,836 CONTROL APPARATUS Application August 30,1944, Serial No. 551,804

12 Claims. (01. 1923.0)

This invention relates to control apparatus and more particularly to thefluid pressure type for controlling a plurality of different operationsin a desired sequence, such as required in controlling a reversibleDiesel engine.

In the copending application of Harry G. May and myself, Serial No.521,798, filed February 10, 1944, there is disclosed a fluid pressuresystem of the above type which embodies a power piston adapted to beoperated by fluid under pressure supplied to act on one side tocondition the reverse gear or timing of a reversible engine to providefor operation of the engine in one direction, and adapted to be operatedby fluid under pressure supplied to act on the opposite side tocondition said gear to provide for operation of said engine in thereverse direction. An operators control device is operative toselectively provide fluid pressure on either the one side or on theopposite side of the power piston. The structure further embodies meansfor delaying the supply of fluid to actuate the power piston for acertain period of time, such as 6 seconds, after operation of theoperator's control device to provide such fluid, and the purpose of thisdelay is, to insure the stopping of the engine in one direction ofoperation before permitting operation of the power piston to reverse theengines reverse gear or timing to provide for operation of the engine inthe opposite direction.

This delay in supplying fluid to act on the power piston is effectiveunder all conditions of engine control, even when the operator desiresto restart and operate the engine in the same direction that it lastoperated. Under this latter condition the delay is not necessary,however, since the engines reversing gear is already conditioned toallow starting of the engine.

The principal object of the invention is therefore the provision ofmeans for rendering the delay means above described ineffective uponstarting the engine in the same direction that it last operated.

Other objects and advantages will be apparent from the following moredetailed description of the invention.

In the accompanying drawing; Fig. 1 is a diagrammatic view of a controlsystem embodying one form of the invention; and Fig. 2 is a view of theportion of the structure shown in Fig. 1 and embodying another form ofthe invention.

Description Referring first to Fig. 2. The reference numeral 1 indicatesa reversible Diesel engine which is arranged to be connected throughsuitable coupling means 2 to a drive shaft 3, said engine being operableto turn said shaft in either, one direction or in the opposite directionaccording to the direction of operation of the engine. The referencenumeral 4 designates a brake for the drive shaft 3 and thereby theengine. The numeral 5 indicates a brake cylinder device adapted to beoperated by fluidunder pressure supplied through a pipe 6 to actuate thebrake 4 for braking, the shaft 3 and the engine l, and adapted tooperate upon release of fluid under pressure from said pipe to releasesaid brake. The numeral 1 indicates a starting air pipe through whichcompressed starting air is adapted to be supplied to certainror all ofthe cylinders of the engine in order to effect starting of the engine inthe direction determined by the timing or condition of the engines valvegear. The supply of starting air to pipe I is arranged to be controlledby a starting air valve device 8 which is adjustable by a lever 9. Withlever 9 in the position in which it is shown in thedrawing the supply ofstarting air to the starting air pipe 1 will be cut off, while uponmovement of said lever to a position such as indicated by a dot and dashline In, starting air will be admitted to pipe 1 and thereby to theengine.

Movement of lever 9 to its different positions may be controlled by astarting control motor I l which is operative upon supply of fluid underpressure to a pipe l2 to move the control lever 9 to the positionindicated by the dot anddash line 10 and which is operative upon releaseof fluid under pressure from said pipe to return the lever 9 to theposition in which it is shown in the drawing. 7

The reference numeral I3 indicates a speed governor of any conventionaltype arranged to be driven by and to operate at a speed proportional tothat of the engine I for limiting the fuel supply to and thereby thespeed of the engine in accordance with the adjustment of a governorcontrol lever l4. This lever may have an engine idling position in whichit is shown in the drawing and may be adjusted to any position betweensaid idling position and a maximum speed position such as indicated by adot and dash line I5 to thereby provide for any degree of speed of theengine.

The adjustment of the speed control lever l4 may be controlled by aspeed control motor I6 which is operable upon supply of fluid underpressure to a speed control pipe IT to adjust said lever out of theidling position to a position corresponding to the pressure of suchfluid, A certain maximum pressure of fluid in control pipe I! will causeoperation of the motor 16 to move the speed control lever l4 to themaximum speed position indicated by the clot and dash line I5, whileopening said pipe to atmosphere will cause operation of said motor tomove the-speed control lever I 4 to idling position in which it is;shownin the drawing.

The reference numeral I8 indicates a fuel cutoif device which isarranged to out off the supply of fuel to the engine, in anyconventional manner, to allow stopping .of the engine. Operation of thefuel cut-ofi device may be controlled by a lever [9 having a fuelcut-off position in which it is shown in the drawing and afuelsupplyposition indicated by a dot and dash line 20. The lever I9 is connectedto a fuel cut-oifmotor 2l which is arranged to be controlled by pressureof fluid in pipe .6 and which. is operable upon supply of fluid underpressure to said pipe to move lever [9 to its fuel cut-oifposition. andwhich is .operable upon release of fluid. pressure from said pipe toefiect movement of said lever to its fuel supply position.

The engine I isprovided with a rotatable shaft 22 for effecting, inanyconventional manner as by means of gears and racks (not shown), thereversingof the engines valve gearor timing to provide for startingandoperation of the engine in either one direction, or inthe reversedirection. A gear 23is secui'edto shaft-22-for turning same.

The structuresso fardescribed for controlling the operation of engine[are arranged to be controlled by a maneuveringcontrol valve device 26mounted on theengine and which is arranged to be controlled by anoperators control valve device .21.

The maneuvering controldeviceZG comprises a bracket 29 upon whichisremovably mounted a fluid reversing-motor 30 for actuatingthe,reversing shaft 22, and alsocomprises a timing or interlock valvedevice 3! forcontrolling the operation of saidmotor, and for alsocontrolling the operation of the starting motor ll, the-fuel cut-offmotor 2| and thebrake 4.

The reversing motor 30 ,comprises a cylinder containing a double actingpiston 33, at one side of which is a pressure chamber 34. The piston331s provided with a rod '35 projecting from the opposite side through apressurechamber 36 and a pressure head 31, closingone end of saidcylinder, to the exterior of said head. Exteriorly of the pressure .head31, the rod 35 is provided on one side with gear teeth,38 which -meshwith the teeth on gear 23 on the reversing shaft 22, wherebyreciprocation of piston 33 in its cylinder will turn the reversingshaft22. The piston 33 has twooperating positions, namely, an asternposition in whichit is shown jinthe drawing, and which is definedbyvcontact between saidpiston and the closed end of the cylinder, forconditioning the engines reversing shaft 22 to provide for operation ofthe engine in an astern direction, and the second position which isdefined by contact between said piston and .the pressure head ,31'tocondition the reversing shaft22 to provide for operationof the engine inthe opposite or an ahead direction. Movement of the piston 33 to itsastern position is adaptedto be effected by fluid under pressuresupplied to chamber 36 by way of a, passage 39, when chamber 34 is opento atmosphere through a passage 40, while movement of said piston to theahead position defined by contact with the pressure head 3'! adapted 4to be obtained by fluid under pressure supplied through passage 40 tochamber 34 when fluid pressure is released from chamber 36 by way ofpassage 39.

The supply and release of fluid under pressure to and from passages 39and 40 is controlled by astern and aheadpilot valve devices 42 and 43,respectively; which constitute a part of the timing or interlock valvedevice 3|. The timing or in-- terlock valve device 31 further comprisesa start ing control valve device 44 for controlling the supply andrelease of fluid under pressure to and from the starting control motor II, and also comprises a fuel and brake control valve device 45 forcontrolling the supply and release of fluid under pressure to and frompipe 6, the brake cylinder device 5 and fuel cut-off motor 2!.

The astern pilot valve device 42 comprises a fluid pressure supply valve41 contained in a chamber 48 whichis adapted to be constantly suppliedwith. fluid under pressure from any suitable source by wayof a passage49, a chamber 59 and a passage 5i. The valve'4l has a fluted stem 52extending through a bore in a partition wall separating chamber from achamber 53, which latter chamber is connected to passage 39 leading tochamber 36 below the power piston In chamber 53 the supply valve stem 52engages a release valve 54 arrangedto seat on the end of a movableplunger 55. The release valve has a fluted stem 56 extending into a boreinplunger 55, which bore is in constant communication with theatmosphere through ports 51 in the plunger, ports 58 in a sleeve 59secured in the casing, a chamber 69,,a passage 6|,a chamber 62 and avent port 63. .In plunger'55 there isa spring 64 which is connectedthrough. apin 65 to the release valve stem ,55.for,urging said valve outof seating contact with the end of said plunger. A spring 66 havinggreater precompressed force than spring ,64 is providedin chamber 48 andacts on the supply valve 47 for urging said valve in the direction ofits seat.

The end of plunger which is opposite the release valve 54 .is connectedto a follower 6'! engaging one .side of a flexible diaphragm 68. Attheopposite side of diaphragm 68 is a fluid pressure control chamber.69. A precompressed coil spring 15 acts on follower 61 for deflectinthe .diaphragmSB in the direction of chamber 69, such movement beinglimited'by contact'between said diaphragm and a stop H. When diaphragm68 is subjected, in chamber 69, to fluid at a pressure sufficient toovercomespring 10, said diaphragm will deflect against the opposingforce of said spring as will be apparent. Upon movement of diaphragm 68against the opposing force of spring 10, the plunger 55 will initiallymove relative to the release valve 54, due to the fact that the pressureof spring 66 exceeds that of spring 64. After a certain degree of suchmovement plunger 55 will engage the release valve 54 for closingcommunication between chamber 53 and chamber 60, and further movement ofthe diaphragm 68 will then act through said valve to unseat the fluidpressure supply valve 51. Conversely, upon release of fluid pressurefrom chamber .69, and movement of diaphragm 68 and plunger 55 by spring19 back to the position defined by stop H, the fluid pressure supplyvalve 41 will be seated by spring 66 ahead of the opening of the releasevalve 54 by spring 64.

The pressure chamber 69 above diaphragm 68 'is-connected through apassage 12, a choke 13,

and a communication by-passingsaid choke and containing seriallyarranged check valves 9|, to a passage 14 which is connected to anastern control pipe 15 leading to the operators control valve device 21.The check valves 9| are provided to render choke 13 efiective toregulate the rate of flow of fluid under pressure from pipe 15 tochamber 69, while said valves will open upon reverse flow of fluid underpressure to provide for a relatively fast release of fluid underpressure from said chamber to pipe 15.

The ahead pilot valve device 43 is structurally identical to the asternpilot valve device 42, just described, and briefly described, comprisesa supply valve 16, a release valve 11, a plunger 18, having a seat forsaid release valve,a follower 19 engaging one side of a flexiblediaphragm 89, a control spring 8| acting through said follower on saiddiaphragm in opposition to pressure of fluid in a chamber 82, a spring33 for closing the supply valve 16 and a spring 84 for unseating therelease valve 11 from the end of plunger 18. The supply valve 16 iscontained in the fluid pressure supply chamber 48, while the releasevalve 11 is contained in a chamber 85 which is connected to passage 49leading to chamber 34 at the upper side of thereversing piston 33.

The chamber 82 above diaphragm 89' is connected through a passage 86, achoke 91 and a passage 88 to an ahead control pipe 89 leading to theoperators control valve device 21. The choke 91 is provided to restrictflow of fluid' under pressure in the direction from pipe 89 to pressurechamber 82, while a faster rate of outflow of fluid from said chamber isprovided for through a communication by-passing choke 81 and containingtwo serially arranged check valves 99.

The starting control valve device 44 is structurally identical to theastern and ahead control valve devices 42 and 43 and, briefly described,comprises a fluid pressure supply valve 95, a release valve 96, aplunger 91, a flexible diaphragm 98, a spring 99 acting on saiddiaphragm in opposition to pressure of fluid in a control chamber I99, aspring I9l for closing the supply valve 95 and a spring I92 for openingthe release valve 96. The supply valve 95 is contained in a chamber I93which is connected by a passage I94, to a starting control pipe I95leading to the operator's control valve device 21. The release valve 96is contained in a chamber I96 which is connected by a passage I91 topipe I2 leading to the starting control motor II. The diaphragm chamberI99 is connected through a passage I98 and a'choke I99 to a controlpassage H9.

The control passage I I9 leads to the side outlet of a double checkvalve device H2 which com prises two check valves H3 and H4 contained inchambers H5 and H6, respectively. These check valves are connectedtogether for movement in unison by a stem II1 which loosely extendsthrough a bore provided in a wa1l'II'8 which separates chambers H5 andH6. At the opposite ends of this bore, the wall I I8 is provided withseats for contact with the valves H3 and H4, respectively, said valvesbeing spaced apart by stem H1 a distance exceeding that between saidseats whereby when either valve is seated the other will be unseated.The bore through the wall H8 containing stem H1 is connected by one ormore radial bores I I9 to passage H9.

The chamber H6 containing check valve H4 is open through a passage I29containing a choke I2I to chamber 36 below the power or reversing piston33 when said piston is in contact with the closed end of the cylinder.Upon movement of piston 33 out of contact with the closed end of thecylinder in the direction of pressure head 31, the passage I29 is firstdisconnected from chamber 36 and then opened past said piston topressure chamber 34.

The chamber II5 containing check valve H3 is connected by a passage I22containing a choke I23 to pressure chamber 36 with the piston 33 in theastern position as shown in the drawing, and said passage is adapted tobe opened to chamber 34 upon movement of piston into contact with thepressure head 31.

The fuel and brake control valve device 45 is also structurallyidentical to the astern and ahead control valve devices 42 and 43 and tothe starting control valve device above described and, brieflydescribed, comprises a valve I39, a second valve I3I, a plunger I32having a seat for valve I 3|, a flexible diaphragm I33, a spring I34acting on one side of said diaphragm in opposition to pressure of fluidin a chamber I35 at the opposite side, a spring I36 acting to close thevalve I39 and a spring I31 acting to open the valve I3I. The valve I3Iis contained in a chamber I38 which is connected through a passagel39 topipe 6 leading to the brake cylinder device 5 and fuel cut-off motor 2|and is arranged to control the flow of fluid under pressure from chamber59 to chamber I38. The valve I39 is contained in chamber 62 which isopen toatmosphere through the vent 63 and is provided to controlcommunication between said chamber and chamber I38.

Pressure chamber I35 above diaphragm I33 is connected to a passage I49which leads to the side outlet of a double check valve I4I which issubject on its opposite ends to pressure of fluid from chambers 53 and85 in the astern andv ahead pilot valve devices 42 and 43, by way ofpassages I42 and I43,'respectively. Upon supply of fluid under pressureto passage I42, the double check valve will be moved by such pressure toa position the reverse of that shown in the drawing for openingcommunication between said passage and passage I49 while closingcommunication between passages I49 and I43. Upon supply of fluid underpressure to passage I43, the double check valve I4I will move to theposition in which it is shown in the drawing for opening communicationbetween passages I43 and I49 and for closing communication betweenpassages I49 and I42. The diaphragm chamber I35 is also connectedthrough a communication including two serially arranged check valvesvI44 to passage I98 leading to pressure chamber I99 above diaphragm 98in the starting control valve device 44, said check valves beingarranged to prevent flow of fluid under pressure from chamber I35 topassage I98 but to permit flow in the opposite direction.

The operator's control valve device 21 is provided for controllingthrough pipes 15, 89 and I supply of fluid under pressure to and itsrelease from diaphragm chambers 69, 82 and I93 in the asternand aheadpilot valve devices 42 and 43 and in the starting control valve device44, respectively, and for also controlling through pipe I1 supply andrelease of fluid under pressure to and from the speed control motor I6.The operators control valve device therefore comprises valve means (notshown) for controllin the pressure of fluid in the pipes just mentionedand a lever I45 for controlling "the operation or said valve means.

The lever I45 extends through guide slot I46 and has a Stoppositionintermediate the. ends ofsaidslot. At'one side of Stop position indicated in the drawing by a legend Ahead, the lever I45 has'a' Run andidle position which is located substantially'midway between Stopposition and the end of the slot where said lever has a Full speedposition. Adjacent the Run and idle position the slot I4 6 opens to aside slot I41 to allow movement of lever I45 to a Start position. At theopposite side of Stop position, indicated by the legend Astern, thelever I45 has oppositely arranged Run and idle and Full speed positions,and adjacent said Run and idle position a Start position in a side slotI48.

In Stop position of lever I45 the valve means (not shown) controlled bysaid lever are operable to open the several pipes 15, I39, I05 and I! toatmosphere. L1 "Run and idle position at the Ahead side of Stop positionthe valve means controlled by lever I 45 are operative to supply fluidunder pressure to the ahead control pipe 89 while maintaining the asterncontrol pipe 15, the starting control pipe I05 and the speed controlpipe I! open to atmosphere, While upon movement of said lever into theside slot Ml fluid under pressure is adapted to be additionally suppliedto the starting control pipe I05. In the Run and idle position of leveri 45 at the opposite or astern side of Stop position, fluid underpressure is adapted to be supplied to the astern control pipe I5 whilethe ahead control pipe 89, the starting pipe I05 and the speed controlpipe I'I will be open to atmosphere, While upon movement of said leverinto slot I48 fluid under pressure will also be supplied to the startingcontrol pipe I05.

- When the lever I45 is in either of the Run and idle positions thespeed control pipe I? is adapted to be open to atmosphere as abovedescribed, for rendering the speed control motor it effective to movethe governor control lever I 4 to the idle position in which it is shownin the drawing, while upon movement of the operators lever I45 to eitherof the Full speed positions fluid at a maximum degree of pressure isadapted to be provided through pipe I1 to the speed control motor I6 foroperating said motor to move the governor control lever I4 to themaximum speed position indicated by the dot and dash line I5, to therebyprovide for operation of the engine at maximum speed. Any desired degreeof speed or output of the engine, between idle and maximum may beobtained by suitable adjustment of the operators control lever I45between either Run and idle position and the adjacent Full speedposition.

The control apparatus as so far described is substantially identical tocorresponding parts of the control apparatus fully disclosed anddescribed in the copending application hereinbefore referred to, in Viewof which, a more detailed disclosure and description of such parts isnot considered essential in the present application to a clearunderstanding of the invention.

The operation of the apparatus as so far described is as follows:

Let it be initially assumed that the operators control lever I45 is inStop position opening the astern and ahead control pipes I5 and 88,respectively, to atmosphere, and also opening the starting control pipeI05 and the speed control pipe I! to atmosphere. Chambers 60 and 82 inthe astern and ahead pilot valve devices 42 and 43 will thus be open toatmosphere so that the parts of said devices willbe in the position inwhich they are shown in the drawing with the release valves 54 and 11open. Chamber 34 above the reversing piston 33 will therefore be open toatmosphere through passage 40and past valve I1, while chamber 36 belowsaid piston will also be open to atmosphere through passage 39 and pastvalve 54. The reversing piston 33 will therefore be in a staticcondition, and let it be assumed that it is in the position in which itis shown in the drawing conditioning the engines valve gear foroperation of the engine in the astern direction.

With diaphragm chambers '69 and 82 in the astern and ahead pilot valvedevices 42 and 43 open to atmosphere, chamber I35 in the fuel and brakecontrol valve device 45 will also be open to atmosphere past either oneend or the other of the double check valve MI and thence through eitherpassage I42 or I43 and past the release Valve 54 or TI, respectively.The parts of the fuel and brake control valve device 45 will thereforebe positioned as shown in the drawing with valve I3I open, so that fluidunder pressure supplied through passage 49 to chamber 50 will flow pastsaid valve to chamber I38 and thence through-passage I39 and pipe 6 tothe brake cylinder device 5 and to the fuel cut-off motor 2I. The brakecylinder device 5 Will therefore be operated to cause the brake '4 tobrake the drive shaft 3 of the engine, while the fuel cut-off motor 2!will be operated to hold lever I9 in its fuel cut-off position in whichit is shown in the drawin for cutting off the supply of fuel to theengine.

With diaphragm chamber I35 in the fuel and brake control valve device 45open to atmosphere as above described, fluid under pressure will also bevented from diaphragm chamber I00 in the starting control valve device44 by way of the check valves I44, chamber I35 and passage I40, so thatthe parts of the starting control valve device 44 will be positioned asshown in the drawing with the release valve 96 open. With valve 06 openchamber I06, passage I01, and thereby pipe I2 and the starting controlmotor II will be open to atmosphere so that lever B of the starting airvalve device 8 will be in its starting air cut-off position in which itis shown in the drawing.

Let it now be assumed that the operator desires to re-start the enginein the astern direction, in which it last operated, as determined by theposition of the reversing piston 33 in contact with the closed end ofits cylinder as shown in the drawing.

In order to start and operate the engine in the reverse or asterndirection, the operator will move the control lever I45 from Stopposition to the Astern Start position in slot I48. This operation oflever I45 will effect a supply of fluid under pressure to the startingcontrol pipe I05 and to the astern control pipe 15, while maintainingthe ahead control pipe 89 and the speed control pipe I1 open toatmosphere.

Fluid under pressure thus supplied to the start ing control pipe I05will flow to chamber I03 in the starting control valve device 44 wherefor the present it will stop since the supply valve is closed. Fluidunder pressure supplied to the astern control pipe 15 will however flowthrough passage 14, choke 13 and passage 12 to diaphragm chamber 69 inthe astern pilot valve device 42. When a suflicient pressure of fluid isthen obtained in chamber 69 acting on diaphragm 68 to overcome theopposing force of spring 70, said diaphragm will deflect in a downwarddirection and move plunger 55 into contact with the re- 9 lease valve 54and then move said valve to open the supply valve 41. Fluid underpressur will then flow from chamber 48 past the supply valve 41 tochamber 53 and thence through passage 39 to chamber 36 below thereversing piston 33 to act on said piston for urging it to its asternposition, which it already occupies as shown in the valve IT in theahead pilot'valve device 43. The

pressure of fluid provided through passage I42 and "acting on the lowerface of the double check valve I 4| will therefore shift said valve toits upper position for opening communication between said passage andpassage I40 to permit flow of fluid under pressure from passage I42 topassage I40'and thence to chamber I35 above diaphragm I33 in the fueland brake control valve device 45. 7

When sufiicient'pressure is-thus obtained in chamber I35 toovercome theopposin force of spring I34 on diaphragm I33, said diaphragm willdeflect in a downward direction and shift the plunger I32 first intocontact with valve I3I for closing off the supply of fluid underpressure from chamber 50-to chamber I38. Further deflection of diaphragmI35 will then act through valve I3I to open valve I30, whereupon fluidunder pressure will be released from chamber I30 to chamber 62 andthence to atmosphere through port 33. Upon this release of fluid underpressure from chamber I38, fluid will also be released from passage I39and pipe 6 and thus from the brake cylinder device 5 and from the fuelcut-off motor 2 I. The brake cylinder device 5 will then operate torelease brake 4 on shaft 3, while the fuel cutoff motor 2I will operateto move lever I9 of the fuel cut-off valve device I8 to the positionindicated by the dot and dash line 20 for admitting fuel to the engine.

7 At substantially the same time that the brake 4 on shaft 3 is releasedand the fuel cut-01f valve device I is operated toadmit fuel for runningthe engine, the fluid under pressure supplied to chamber 36 below thereversing piston 33 will flow throughpassage I22 to chamber M for actingon the check valve II3 to maintain said check valve seated, and fluidunder pressure will also flow from chamber 36 through passage I20 tochamber I I6 containing the unseated check Valve H4. This condition ofthe two check valves H3 and H4 is the same as during las'toperation ofthe engine and will-not change upon simultaneous supply of fluid underpressure to the two chambers, H5 and I I6, as occurs in the particularoperation being described.

Fluid under pressure supplied to chamber H6 in the double check valveII2 will flow past the check valve I M and through the radial ports I I9to passage H0 and thence through choke I09 to chamber I00 abovediaphragm 98 in the starting control valve device 44. When the pressureof fluid thus obtained in chamber I00 becomes sufficient to overcometheopposing force of spring 99 on diaphragm 98, said diaphragm will deflectdownwardly andmove stem 91 into engagement with releasevalve 96 and thenshift said release valve to open the supply valve 95. Upon opening ofvalve 95,'fluid under pressure supplied to chamber I03 through thestarting control pipe I05 with gee-s36 l r r ,10 a the operator'scontrol lever in the Astern Start position in recess'l48, will flow pastsaid valve to chamber I06 and thence through passage I0! and pipe I2 tothe starting control motor Ii and actuate said motor to move thestarting air valve lever 9 to the supply position indicated by the dotand dash line I0, whereupon starting air from any conventional sourcewill be supplied to the starting air pipe I for supply to the enginecylinders for starting the engine to turn in the astern direction, asdetermined by the position of the reversing piston 33. As soon as theengine starts to turn under the influence of starting air provided inpipe I, the fuel supplied to the engine by operation of the cut-ofiflvalve device I8 will fire and cause the engine to run on fuel. After theengine fires and is running on fuel the operator will then movethecontrollever I45 out of the Astern "Start position in recess I48 to the"Astern Run and idle position and the engine will then continue to runon fuelat an idling speed. This movement of lever M5 to the Astern Runand idle position" will however cut off the supply of fluidunderpressure to and will release fluid under pressure from the startingcontrol pipe I05, and since said pipe is open past valve in the startingcontrol valve device 44 to the starting air motor II, fluid underpressure will be released from said motor to effect operation of thestarting air valve device 8 to cut off thesupply of starting air to theengine.

To now increase the speed of the engine operating in the asterndirection, the operator may adjust lever I45 between the Run and idleposition and the Full speed position at the Astern side of Stopposition, as will be apparent.

When the operator desires to stop the engine he will move the controllever I45 to Stop position for releasing fluid under pressure from theastern control pipe I5 and thus from diaphragm chamber 09 in the asternpilot valve device 42, this release of fluid under pressure from chamber69 occurring at a relatively rapid rate through the communication,including the check valves 9], which by-passes the ohoke 'l3'. When thepressure in diaphragm chamber 69 is sufliciently reduced, spring I0 willreturn the-diaphragm 00 and plunger 55 to the positions in which theyare shown in the drawing, permittingclosure of the supply valve 41' byspring 60 and opening of the release valve 54 by spring 04. Uponopeningthe release valve 54 fluid under pressure will be released fromchamber 53 and the connected chamber 36 below the reversing piston 33,and also from diaphragm chamber I35 in the fuel and brake control valvedevice 45, by way of passagel lfl, past the double check valve I41 andthrough passage I42. When-the pressure in chamber I35 is thussufficiently-reduced, spring I34'will return the diaphragml33'and'plunger I32 to the positions'in which they are shown in thedrawing to permit closure-of valve I30 by spring I36 and opening ofvalve I3I by spring I3I.- Upon opening of valve I3I fluid under pressurewill be'su'p plied from passage 49 and chamber 50 to chamber I38 andthence through pipe 6 to the brake cylinder device 5 and to the fuelcutf motor 2 i. 'The brake cylinder device 5 will then operate toactuate brake 4 to stopthe drive shaft 3 and the engine I while the'fuelcut-off motor 2I will oper ate to move lever 'IB of the fuel cut-offvalve device I8 to the fuel cut-off position in which it is shownin'thedrawing for cutting off the supply of fuel to the engine, so that theengine may be stopped by brake 4,--

When fluid under pressure is released from diaphragm chamber I35 in thefuel and brake control valve device 45, fluid under pressure will alsobe released from diaphragm chamber I in the starting control valvedevice 44 by way of the communication including the two check valves I44and thence through diaphragm chamber I35, so that the parts of thestarting control valve device will return to the position in which theyare shown in the drawing and in which position the sup ly valve 95 willbe closed and the release valve 96 is opened.

Now let it be assumed that with the engine at rest and with thereversing piston 33 in the position in which'it is shownin the drawingproviding for astern operation of the engine, the engineer desires tostart the engine in the ahead direction. To accomplish this, theoperator will move lever I45 to the Ahead Start position in the sideslot I41 to supply fluid under pressure to the ahead control pipe 89 andto the starting pipe I05, while maintaining the astern pipe 15 and speedcontrol pipe I! both open to atmosphere.

The fluid pressure supplied topipe I will flow to chamber I03 in thestarting control valve device 44 but the valve 95' in said device willbe closed at this timeas previously mentioned. The fluid pressuresupplied to the ahead control pipe 89 will however flow through choke8'! and passage 86 to chamber 82 above diaphragm 80 in the ahead pilotvalve device 43, and when sufiicient pressure is thus'obtained in saidchamber to overcome the opposing force of spring 8I on diaphragm 90 saiddiaphragm will deflect in a downward direction andmove plunger I8 intoseating engagement with valve 11 and then actuate said valve to open thefluid pressure supply valve 18.

Fluid under pressurefrom chamber 48 will then flow past the supply valve16 to chamber 85 and thence throughpassage 40 to chamber 34 above thereversing piston 33. Chamber 36 below the reversing piston is at thistime open to atmosphere through passage 39 and past the open releasevalve 54 in the astern pilot valve device 42, so that when suflicientpressure of fluid is obtained in chamber 34 on the reversing piston 33,said piston will start moving in the direction of the pressure head 31.

As the piston 33 is moved toward the pressure head 31 it will firstclose communication between chamber 36 below the piston and passage I20,and then after a slight further movement open said passage to chamber 34above the piston which is being supplied with fluid under pressure.Fluid under pressure vfrom chamber 34 will then now through passage I20to chamber I I6 containing the check valve II 4. Chamber II5 containingthe check valve I I3 is at this time open to atmosphere by way ofchamber 36 below the reversing piston 33, as a result of which, thepressure of fluid provided in chamber H6 and acting on the check valve II4 will move said check valve toward the left-hand and into contact withits seat, this movement shifting the check valve II3 out of contact withits seat.

Finally, when the reversing piston 33 obtains its ahead position definedby contact with the pressure head 31, and in which position the enginesreversing gear will have been reversed to provide for operation of theengine in the ahead direction, the passage I22 will be opened past saidpiston to chamber 34 which is supplied with fluid under pressure. Fluidunder pressure will then flow from chamber 34 through passage I22 tochamber H5 and thence past the open check valve II3 to passage I10 andthence through choke I09 and passage I08 to diaphragm chamber I 00 inthe starting control valve device 44. When a sufficient pressure offluid is thus obtained in chamber I00 to overcome the opposing force ofspring 99 on diaphragm 98 said diaphragm will deflect ina-downwarddirection and move plunger 91 into engagement with the releasevalve 96 and then act through said valve to open the supply valve 95.When the supply valve 95 is opened fluid supplied to chamber I03, withthe operators control valve device in the Ahead" Start position, willflow past said valve to chamber I06 and thence through passage I07. andpipe I2 to the starting air motor II and operate said motor to actuatethe starting air valve device 9 to supply starting air to pipe I andthence to the engine cylinders for starting the engine to turn in thenew or ahead direction, as determined by the position of the reversingpiston 33 in contact with pressure head 31.

At the same time as the reversing piston 33 is operating to reverse theengines-valve gear or timing to provide for ahead operation of theengine, as just described, fluid under pressure supplied to chamber inthe ahead pilot valve device 43 will also flow through passage I43 tothe upper end of the double check valve MI. The lower end of the doublecheck valve is at this time open to atmosphere through passage I42 andpast the open release valve 54 in the astern pilot valve device 42, as aresult of which, the pressure of fluid provided in passage I43 willshift said valve to its lower position for opening communication betweensaid passage and passage I40. Fluid .thus supplied to passage I40 willthen 'flow to chamber I35 in the fuel and brake control device 45 andwhen this pressure becomes sufficient to overcome the opposing force ofspring I34 on diaphragm I33, said diaphragm will deflect in adownwarddirection and move plunger I32 into contact with valve I3I forcutting ofi the supply of fluid under pressure from chamber 50 tochamber I38, and then act through said valve to open valve I30. Whenvalve I30 is opened fluid under pressure will be vented from the brakecylinder device 5 and from the fuel cut-01f motor 2| to thereby releasethe brake 4 and effect operation of the fuel cut-ofi valve device I8 tosupply fuel to the engine. When the engine starts tuming under theinfluence-of compressed starting air supplied through the pipe I asabove described, the engine will then flre and run on the fuel suppliedthereto in the ahead direction as determined by the reversing piston .33in contact with the pressure head'3'l.

After the engine is started in the ahead direction and is runningon fuelas just described, the operator will move the control lever I45 out ofthe slot I41 to the Runand idle position at the Ahead side of Stopposition for releasing fluid under pressure from the starting controlpipe I05 and thereby from the starting air motor II to cause operationof the starting air supply valve 8 to cut off .the'supply of startingair to the pipe 1. The engine will then continue to run on fuel, and byproper adjustment of the operators control lever I45 between the AheadRun and idle position and the Ahead Full speed position any desireddegree of engine speed may be obtained, as will be apparent.

In order to stop the engine from operation in the ahead direction, theoperator will move lever I45 to Stop position to release 'fluid underpressure from the speed controlpipe I I'to permit the lease fluid underpressure from the ahead control pipe 89 and from chamber 82 in the aheadpilot valve device 43. The ahead pilot device 43 will then operate torelease fluid under pressure from chamber I35 in the fuel and brakecontrol valve device 45 to permit operation of the latter device tocause operation of the fuel cut-off motor 2| to actuate the fuel cut-01fvalve device I8 to cut off the fuel supply to the engine, and to alsocause operation of brake 4 to stop the engine, as will be apparent fromthe above description.

With the operators control lever I45 in a position between the Run andidle and Full speed positions at the Ahead side of Stop position causingoperation of the engine in an ahead direction, let it be assumed thatthe operator desires to reverse the direction of operation of theengine. To accomplish this'he may move lever I45 from the position itmay be in at the Ahead side of Stop position directly to the oppositeside of Stop position and into the side slot I48 to the Astern Startposition.

This movement of the operators control lever I45 to the Astern Startposition will release fluid under pressure from pipe I1 and thereby fromthe speed control motor It to permit movement of the governor controllever I4 to its engine idling position in which it is shown in thedrawing, and will also release fluid under pressure" from'the aheadcontrol pipe 89 and supply fluid under pressure to the astern controlpipe I5 and to the starting control pipe I05. Upon the release of fluidunder pressure from the ahead control pipe 89, the fluid pressure willbe promptly released from diaphragm chamber 82 in the ahead pilot valvedevice 43 by way of the serially arranged check valves 90 and spring 8iwill then deflect diaphragm 80 to the position in which itis shown inthe drawing. This movement of diaphragm 80 and thereby of stem I8 willpermit closing ofthe supply valve 16 by spring 83 and opening of therelease valve 11 by spring 34, soas to release fluid under pressure fromchamber 34 above the reversing piston 33, and for at the same time,releasing by way of the double check valve I4I fluid under pressure fromchamber I35 above'diaphragm I33 in the fuel and brake control valvedevice 45. The fuel and brake control valve device will then operate tosupply fluid under pressure from chamber50 to chamber I38 and thencethrough pipe 6 to the brake cylinder device 5'and fuel cut-out motor2lfor applying brake 4 to shaft 3 and for actuating the fuel cut-out valvedevice I8 to cut off the'supply of fuel to the engine. With the supplyof fuel to the engine cut off and brake 4 applied to shaft 3, said brakewill cause deceleration and the eventual stopping of the engine.

When fluid under pressure is released from diaphragm chamber I35 in thefuel and brake interlock valve device 45 as just described, fluid underpressure will also be released from diaphragm chamber I00 in thestarting control valve device 44 by way of the check valves I44 andchamber I35, so as to permit operation of the starting control valvedevice 44 to efiectjclosure of valve 95. With the operators controllever in the Astern Start position supplying fluid under pressure to thestarting control pipe I05, this closing of valve 95 will prevent flow ofthis fluid from chamber I03 to the startingcontrol motor II,'atthistime. I I At thesame time as .the structure operates to cut ofithe:supply;of;fuelto the engine-and to apply brake 4 to the engine driveshaft 3 to brin g the engine to a stop from operation in the aheaddirection, fluid under pressure supplied to the astern control pipe I5will flow through choke 13 and passage I2 to diaphragm chamber 69 in theastern pilot valve device 42. When a sufficient pressure of fluid isthus obtained in chamber 69 of the astern pilot valve device to overcomethe opposing force of spring I0 on diaphragm 68, said device willoperate as above described to supply fluid under pressure to chamber 36below the reversin'g piston 33 to effect movement of said'reversin'gpiston from its ahead position to contact with pressure head 3I, to itsastern position in which itis shown in the drawing. 7

In the'operation just described, it is desired to point out that theflow capacity of choke I3 with respect to the volume of chamber 69 inthe astern pilot valve device 42 is such as to prevent sufficientpressure being obtained in said chamber for deflecting diaphragm 68against the opposing force of spring I0 for a certain period of timeafter movement of the operators control lever I45 from the Ahead side ofStop position to the Astern Start position in slot I48. This period oftime, for instance 6 seconds, is such as to allow the engine to bebrought substantially to a stop by brake 4 before the astern pilot valvedevice 42 will operate to supply fluid under pressure to chamber 36 formoving the reversin piston out of its astern position. In other words,the choke I3 prevents operation of piston 33 to reverse theengines valvegear or timing for an interval of time of sufficient duration to insurethe engine being brought to a stop by brake 4.

At the same time as fluid under pressure is supplied to chamber 36 belowthe reversin piston 33 for moving said piston to its astern position,fluid under pressure will also flow from chamber 53 in the astern pilotvalve device 42 through passag I42, past the double checkvalve I4! andthrough passage I40 to diaphragm chamber I35 in the fuel and brakecontrol valve device 45. The fuel and brake control valve device 45 willthen operate as before described to release fluid under pressurefrom'the brake cylinder device 5 and from the fuel cut-off motor ill,for thereby releasing the brake 4 on the propeller shaft 3 and'forcausing operation of the fuel cut-01f valve device I8 to-again supplyfuel to the engine. It will be noted that since the astern pilot valvedevice 42 will not operate to supply fluid under pressure to effect 'reversingmovement 7 of the reversing piston 33 until after the engine isbrought to a stop, the brake 4 will not bereleased and fuel will not besupplied to theengine until after the engine has been brought to a stop.

After a certain degree of movement of thereversing piston 33 away fromits ahead position in contact with pressure head 31, fiuid-willbesupplied from chamber 35 through passage I22 to chamber M5 for closingthe check valve I I3 and for opening the check valve I I4.-- Then whenthepiston 33 attains its astern position, in which it is shownin thedrawing, fluid under pressure will flow from chamber 36 to passageI20'and thence past the-open check valve I I4 to passage IIO and to thestarting control valve device 44. The starting control valve device 44will then operate to ope-n communication between chamber' I03; suppliedwith fluid under pressure-from the operators control valve device withlever I45 in' the Astern, Start positionfaridbhiihbi -III6-for Supplyingfluid under pressure to pipe I2 and thence to -the starting controlmotor I I to effectoperation of said motor and thereby of the startinair valve 8 to supply startin 'air to: pipe 1 to effect starting of theengineto turn inthe new or astern direction, as determined bytheposition of the reversing piston 33, which piston will be in contactwith the closed end of its cylinder as shownin the drawing.

It will now be seen .that in reversing theengine from ahead to asternthe structure operates in responseto movement of the operators controllever from the Ahead side of Stop position to ,the Astern Start positionin slot I48, to first cut ofi, the supply of fuel-to the-engine-and toapply-brake 4 to the drive-shaft 3 in order that the engine may bebrought to a stopafter a period of time determined by the flow-capacityof choke 13 with respect tothe volume of chamber 59 in-the astern pilotvalve device 42, which period of time is of sulficient duration toinsure the engine being substantially stopped by brake 4. The pilotvalve device- 42 then operates to cause movement of the reversing piston3 'to its astern position for conditioning the engine to operate in theastern direction, and at substantially the same time causes operation ofthe fuel and brake control valve device 45 to release the'brake 4 on theshaft3 andto-resupply fuel to them-- gine. After the reversing piston 33obtains its astern position, the starting control valve device 44operates to supply starting air to the engine for causing it to startturning in the new or astern direction. With fuel supplied to the engineat this time the engine will then fire and run on fuel. After the enginefires and is running on fuel the operatorwill move lever I45 out of theAstern Start, position in slot I48 to the Astern Run and'idle positionfor releasing fluidunder pressure from .the starting motor II to permitoperation thereof to actuate the starting air valve device 8 to-cut offthe supply of starting air to pipe 1 and to the engine. The-engine willthen continue to run on fuel, and the operator may acceleratethe engineto any desired degree by moving lever I45 out ofthe Astern Run and idle,position in the direction of the Astern Full speed position; as will beapparent.

With the'engine operating in the astern-directionvas just described letit be assumed that the operator desiresyto cause operation-- of theengine in the ahead or forward direction; To accomplish thishe will movetheqcontrol lever I45 from whatever position it may be occupying at theAstern side of Stop position to ,the Ahead" "Start" position inslot I41,foreflecting release of fluid under pressure'from the astern controlpipe 15 and from the speed -control pipe I1, and for supplying fluidunder-pressure to the ahead control pipe 89 and to the starting controlpipe I05.

Upon this release of fluid under. pressure-from the eastern controlpipe15 andfrom diaphragm chamber 69 in the astern .pilotvalve device 42by way-of the check valves 9I, said pilot valve device will operatetorelease fluidunderpre'ssure' from chamber 35 below the reversinglpiseton33-and from diaphragm chamber;:l35 in the fueland brake control valvedevice 45.- The fuel and-brake control valve device 45 will.thenioperate -asbefore described to. supply fluid under pressure;to'the brake cylinder :device and to fuel; cutrofimotor- 2! for.applying. the; brake eration of the starting air valve fuel-to theengine in order that the engine may be brought to a stop by operation ofsaid brake.

At the same time as the fuel is cutoff to the engine and the brake 4 isapplied, fluid under pressure supplied to the ahead control pipe 89 willflow through choke 81 to diaphragm chamber 82 in the ahead pilot valvedevice 43. The choke 81 restricts this supply of fluid under pressuretochamber 82 to such an extent however as to prevent operation of theahead pilot valve device 43 by fluid under pressure for a period of timesuflicient to bring the engine to a substantial stop by brake 4. At thetermination of this time period, such as six seconds, a suflicientpressure will be obtained in chamber 82 to operate the ahead pilot valvedevice 43 to supply fluid under pressure to chamber 34 above thereversing piston 33 and also to chamber I35 in the fuel and. brakecontrol device 45. The reversing piston 33 will then move to its aheadposition in contact with the pressure head 31 for reversing the enginesvalve gear or timing, and at substantially the same time the fuel andbrake control valve device'45 'will operate to release the brake :4 onshaft 3 and effect operation of the fuel cut-off motor EI and thereby ofthe fuel cut-off valve device I8 to resupply fuel to the engine, itbeing noted that the engine is stopped ,before the fuelis resuppliedthereto.

After the reversing piston 33 obtains its ahead position in contact withthe pressure head 37, the starting control valve device 44 will operateto supply air to the starting motor II to effect opdevice 8 to supplystarting air through pipe 1 to the engine to cause said engine to startrotating in the new or ahead direction, which direction is determined bythe reversing piston 83 being in contact with pressure head 31. When theengine is thus started, the fuel supplied to the engine will fire andcause the engine to run on fuel. The operator will then move the controllever I45 out of Ahead Start position in slot I41 to the adjacent Runandidle position to cut off the supply of starting air to the engine andthen by suitable adjustment of said lever between said Run and idleposition and the Ahead Full speed position, the operator may cause theengine to operate in the ahead direction at any desired speed.

It will now be noted that in reversing the engine from; ahead to astern.the choke 13 and diaphragm chamber 69 in the astern control valvedevice'42 provide for the engine being brought to a substantial stopfromoperation in the ahead direction before causing operation of thereversing piston-33 to reverse the valve timing or gear of the engineto. provide for operation in the astern direction. The. choke 81 andchamber 82 in the ahead pilot valve device 43 accomplishes the same ,endwhen reversing the direction of operation ofthe engine from astern toahead.

It should also be noted however that with the engine stopped with thereversing piston 33 in the reverse position in which it is shown in thedrawing, the restarting of the engine in the same orxa'stern'directionisalso delayed by choke 13 and chamber 69 the same as in reversing theengi'n'e from operation in the ahead direction to the astern-direction.Likewise, with the engine stoppedrfrom last operationin an aheaddirection, under which condition the reversing piston 335 will be incontact with the pressure head 31, the: restarting .of the engine in thesame direcabove diaphragm 86 in the ahead pilot valve device 43, thesame asif reversin the enginefrom astern to ahead direction. ,The timedelays provided by chokes13-and 81 are desired in reversing thedirection of operation of the engine from astern to aheador vice versa,for reasons above brought out, but such delays are not essential inrestarting the engine in the same direction that it last operated, andaccording to the invention means are provided for automaticallyeliminating the delay periods incident to these chokes under the lastnamed condition. 1 I n One embodiment of the invention is associatedwiththetiining or interlock valve portion 3I ;o f the maneuveringcontrol valve device 26, as shown in Fig.1, while the other "embodimentof the invention is associated with the reversing piston rod 35, asshown in Fig, 2, I

According tothe embodiment'of theinvention shownin Fig. 1, I, providetwoiike but separate valve devices I56 and IIi' for openingfluid pres"-sure supply communications around chokes '13. and '61 to'chamber's'6'9jand 82, respectively, said communications having greaterflow capacity than said chokes" so as to"elirnin ate the delay efl'ectthereof inrestarting the engine in the last" direction of operation.

The valve device I56 comprisesa casing hav-f ing a chamber I52 which isconnected by a pipe I53 to passage 12 leading to diaphragm chamber 69 inthe astern pilot valve device 42. The cham-, ber I52 contains a poppetvalveI54 having a stem I58 extending through an opening in a wall I55separating said chamber from a chamber I56 which is open through'a pipeI51 to passage 14. It should be noted that pipe I51 is connected topassage-14 at one side-of choke 13 while pipe I53 is connected topassage 12 at-the' opposite side of saidchoke, the'valve I 54 thuscontrolling a communication between these passages by- -pas'singsaidchoke. i Y The valve stem I58 extends from wall I55 through chamber I56and the outer end-wall or chamber I56 to the exterior of the casing. Theportion of stem I58 extending through the wall I55 is fluted to allowflow of fluid under pressure from chamber I56 to chamber I52 when thevalve I54 is outof engagement with a seat provided'on said wall, butthe'portion beyond this fluted por-' tion is cylindrical to minimizeleakage of-fluid under pressure from chamber I56 through the outer. endwall of chamber I56 to atmosphere. A spring I59 in chamber I52 actsonthe valve I54 for urging it to its closed position in which it isshown in the drawing. 7 The valve device I5I is identical in structureto the: valve device I56 and, briefly described, comprises a valve-I66arranged to control communication between a chamber I6I and a chamberI62; A spring I63 in chamber I6I acts on valve I66 for urgingit toitsclosed position.- The valve I66 is provided with a stem I64 projectingto beyond the exterior of .thecasing; The chamber I6I'is connected by apipe I65 to passage 86 at one side of the .choke.81,* while chamber I62is connected by a-pipe I66 to passage 86 at-the opposite side ofsaid,-choke, the communication through these pipes being-controlled by valveI66 and having greater; flow capacity than-said choke so-thatintermediate its ends 1116 flxed pin I68 hasone rmarran d-dis n e he d fva e m V V l I l,

" sureto chamber I12, with chamber I13 open to piston I16to-uns eatvalve I54 in with said valve open said choke will be rendered foropening valvei54and anotherarm arranged to engage stem I64 otvalve I66for opening the lattervalve. The lever I61 also has a third arm tedatitls end to a rod I66 projecting from 16contained in a cylinder 'I1I.At one s de of piston I16 5a chamber I120pen to pipe I53 andat theopposite side a chamber I13 open to pipe I65L Upon'the supply of fluidunder presis on atmosphere, piston" I16 will move to the position in,whichdt'ii's "shown in the drawing for thereby operating thelever'I61f'tof ope'n valve I54 in the valve device'I5'6' and to all'ow'closingof valve I66 in the' valved e!by sprmglsa; Upon the unuerpressure'mchamber I13 mberfj I12' op'enfto atmosphere, the

fill"mo vefto the "opposite end of its actuate leverfl'61"to open valveI66 in the" valve device I 5I'and topermit closing of valve i5i'inthe'valve device I56'by spring I56; "one end of'atensionedtogglespring I15 15 connected to'the connection-betweenlever I68 and" the"piston rod I69,'Whi1e its'other end is anchored onaiixed'pm' I16,thisspring' being fiectiveto'prevent'movement'of piston I16 from eitheroneof its two positions to the-other'position by fluid at deflectdiaphragms 66 or 86 against the opposing forceoftheir respectivespring16 or'8l'.

Now 1et"it be'assumedthat the engine is operating'in'theastermdirection', under which condition'the reversing piston 33will'bein the position in whichitis shown in-the drawing, fluid will beeffective through the astern control pipe 15 in i 69 orthe'astern'pilotvalve device 42' at a'press ure' sufficient to' deflect diaphragm 66against the opposingforce of spring .765 This 'fluid"pressure is'diaphragm' chamber 66 will also be effective throughpipe I53 in pistonchamber "I12 of the cylinderdevice I1 I to operate v thevalve device I56, for-thereby opening the by-pass communication around choke 13.

Now let it be assumed that the engine has been stopped from operation inthe'astern direction by movement of the operators control lever I45 toStop position in which fluid under pressure is released from the asterncontrol pipe 15 and chamber'fia in theast'ernpilot'valve device M, ashereinbefore'described. With fluid thus re leased from the asterncontrol pipe'15;fiuid under pressure will also bereleased-from chamberI12 at th left-hand iace'of piston I16, but with chamber I13 -at theopposite side open to atmospherth'roughthe ahead control pipe 86, atthis time, said piston will remain in the position in which it is shownin the drawing under the action of toggle spring-I 1'5, -so that thevalve I54 will remain open while valve I66Willbe closed. -'-With theengine stopped as just mentioned, if the operator desires to restart theengine in the astern direction, i.-e. the last mentioned directionof-operation'hewill move control l'ever I45 to the Asterh fStartposition in slot I48 as above describedand as a result, fluid under pressure will be supplied to the astern' control pipe 15 and thence topassage 14in the maneuvering control valve device 26. The fluid pressuresupplied to "passage-14willthen flow through pipe I51 past the openvalve I54 to pipe I53 and thence through passage 12 to diaphragm chamber69 to the astern pilot valvedevice 42, it being noted that this flow isthrough a communication .by-.

diaphragmchamber pressure'less than required to passing the choke I3, sothat said choke is inehectivetodelay the supply of fluid under pressureto said chamber. As a result, pressure of fluid in chamber 69 willpromptly increase to the degree required to deflect diaphragm 68 againstspring ill to cause restarting of the engine in the astern direction. Itwill thus be seen that in starting the engine in the astern directionafter last operation in said direction, the open valve lee in the valvedevice I50 nullifies the effect of choke 13 so that the engine restartswithout the delay incident to said choke, above described.

Now let it be assumed that the engine has been stopped from operation inan ahead direction, underwhich condition the reversing piston 33 will bein contact with the pressure head 31. With the engine last operating inthe ahead direction, diaphragm chamber 32 will have been charged withfluid under pressure and this pressure efiective tm'ough pipe I65 inchamber I73 at the righthand side ofpiston I10 will have moved thepiston Silt to the left-hand end of its cylinder for opening the valveI60 in the valve device II. The valve I54 in the valve device I50 willbe closed. If the operator now actuates the control valve device 27 torestart the engine in the last direction of operation, i. e. in theahead direction in the presentinstance, fluid under pressure supplied topipe 8Q and passage 88 will flow past the open valve I 60 in the valvedevice I5I to diaphragm chamber 82 in the ahead pilot valve device 43,this flow being around the choke 81 thus rendering said chokeineffective to delay response of the ahead pilot valve device 43 tooperation of the operators control lever I45. The ahead pilot valvedevice 43 will therefore promptly operate to restart the engine in thelast mentioned direction of operation.

, It should be noted that while the valve devices I50 and I5I eliminatethe delay periods incident to the control of the rate of flow of fluidthrough chokes l3 and 81 when the engine is restarted from stop in itslast direction of operation, as just 20 for automatic control, in adesired sequence, of a plurality of diiferent operations, such asincident to the control of starting, stopping and reversing, and thecontrol'orspeed of power output of a reversible-Diesel engine. Theapparatus em-' bodies pneumatic means operable automatically to delayreversing of theen'gines valve timing or gear while the engine is inmotion. This delay I is desirable when the" direction of operation ofthe described, the toggle spring I15 ensures that the valve I will beclosed during reversing of the direction of operationof the engine fromastern to ahead, and that valve I54 will be closed during reversing ofthe direction of operation of the engine'from ahead to astern, so thatupon reversing the direction of. operation of the engine the chokes Biand I3 will be effective the same as before described:

, As shown in Fig. 2, thevalve devices I50 and i-5I may; if desired, bearranged for control by i an arm I14 projecting'from one side of thereversing piston rod 35, said arm being arranged to open valve [66in thevalve device It when the reversing piston 33 is in the astern positionin which it is shown in Fig. 1, and to open valve I54 with thereversingpiston in its ahead position defined by contact with pressure head 31.Thus, when the engine is stopped with the reversing piston in its asternposition the valve device I5I will be conditioned to render choke I3ineflective in case the engine is restarted in its last direction ofoperation or in the astern direction. On the other hand, in case thereversing piston 33 is in itsahead position the valve device I50 will beconditioned to render choke 8! ineffective in case the engine isrestarted in the ahead direction, as will be apparent.

I Summary From the above descriptionit wilLnow be noted that the fluidpressure control apparatus provides engine is'being changed from aheadto start or vice versa, but it is not desirable upon restarting theengine in the last direction of operation and means are thereforeprovided to automatically eliminate the delay under the last namedcondition;

Having now' describedmy invention, what I claim as new and desire tosecure by Letters Patexit is:

1. An apparatus for conditioning a. reversible prime mover. foroperation in'either one direction or in the opposite directioncomprising in combination, areversing member movable to first and secondpositions for conditioning said prime mover for operation in,respectively, either said one or, opposite directions, operators controlmeans operable to selectively effect movement of said reversingmember'to either oneor the other of its different positions delay meansfor preventing response of said reversing member to operation of. saidcontrol means-for a chosen interval or time after operation of saidcontrol means, and means automatically adjustable in accordance with;the. position of said reversing member to render said delay means eithereffective or inefiective to delay said response of said reversingmember.

2. An apparatus for conditioning a reversible prime mover for operationin either one direction or in the opposite direction comprising incombination, a reversing control member movable to one position forconditioning said prime mover for operation in one direction and movableto a second. position for conditioning said prime mover for operationinthe opposite direction, a first fluid pressure sensitive meansoperable by fluid under pressure to effect movement of said member tosaid one position, a second fluid pressure sensitive means operable byfluid under pressure to effect movement of said member to said secondposition, an operators control device having first andsecond controlpositions, corresponding to the said positions of said reversing controlmember, and being operable upon movement thereto to supply fluid underpressure to, respectively, said first and second pressure sensitivemeans, each pressure sensitive means comprising means operable toprevent operation thereof to effect movement of said reversing member byfluid at less than:achosen pressure; timing means operableto delay for achosen interval of time, after movement or-said control device toitsfirst or second position, obtaining said chosen pressure of fluid, andmeans operableupon operation of said-first pressure sensitive means byfluid under pressure to render the respective timing means ineffectiveand the other timingmeans effective, and operable upon'operation'of saidsecond pressure sensitive means to render the respective timingmeansinefiective and the other timing means efiective.

3. An apparatus for controlling the conditioning of a'reversible primemover for operation in either one direction or in the opposite.direction and for also controlling thestartin'gof said prime movercomprising in combination, reversing means movable toonegposition tocondition said prime mover foroperation in one direction and movable toanother position to condition said prime mover for operation in theopposit direction, an operators control device comprising a lever havinga neutral position, a first position at one side of said neutralposition and a second position at the opposite side of saidneutralposition and being operable upon movement of said lever to saidfirst position to effect movement of said reversing means to said oneposition and upon movement of said lever to said second position toeffect movement of said reversing means to said other position, startingmeans for said prime mover, means operable by said control device insaid first and second positions of said lever to effect operation ofsaid-startingmeans when said reversing means is in, respectively, saidone and other positions, means associated with said reversing meansoperable to prevent operation of said starting means upon movement ofsaid lever to effect movement of said reversing means and duringmovement of said reversing means, control means preventing response ofsaid reversing means to operation of said lever for a chosen interval oftime after operation of said lever, and means operable automatically torender said control means effective to delay response of said reversingmeans to movement of said lever upon movement of said lever to aposition to eflect movement of said reversing means and ineffective todelay response of said reversing means to movement of said lever uponmovement of said lever to either its first or second position when saidreversing means is in, respectively, its said one or other position.

4. An apparatus for controlling the conditioning of a reversible primemover for operation in either one direction or in the opposite directionand for also stopping said prime mover comprising in combination,reversing means movable to one position to condition said prime moverfor operation in one direction and movable to another position tocondition said prime mover for operation in the opposite direction, anoperators control device comprising a lever and being operable uponmovement of said lever to a first position to effect movement of saidreversing means to said one position and upon movement of said lever toa second position to effect movement of said reversing means to saidother position, control means for preventing response of said reversingmeans to operation of said lever for a chosen interval of time afteroperation of said lever, means operable automatically to render saidcontrol means effective to control response of said reversing means tomovement of said lever upon movement of said lever to a position toefiect movement of said reversing means and ineffective upon movement ofsaid lever to either its first or second position'when said reversinmeans is in, respectively, its said one or other position, braking meansfor said prime mover, means responsive to operation of said controldevice in each of said positions of said lever upon movement of saidlever from its other position to effect operation of said braking meansto stop said prime mover, and means operable upon response of saidreversing means to operation of said lever to render said braking meansineffective.

5. An apparatus for controlling the conditioning of a reversible primemover for operation in either one direction or in the opposite directionand for controlling the supply of fuel to said prime. mover comprisingin combinatiomrevers- 22 ing means movable to one position to conditionsaid prime mover for operation in one direction and movable to anotherposition to condition said prime mover for operation in the oppositedirection, an operators control device comprising a lever and beingoperable upon movement of said lever to a first position to effectmovement of said reversing means to said one position and upon movementof said lever to a second position to effect movement of said reversingmeans to said other position, control means for preventing response ofsaid reversing means to operation of said lever for a chosen interval oftimeafter operation of said lever, means operable automatically torender said control means effective to delay response of said reversingmeans to movement of said lever upon movement of said lever to apositionto effect movement ofsaid reversing means and ineffective uponmovement of said lever to either its first or second position when saidreversingmeans is in, respectively, its said one or other position, fuelcontrol means for said prime mover, means responsive to operation ofsaid control device in each of said positions of said lever uponmovement of said lever from its other position to eiiect opera-.

tion of said fuel control means to out on the supplyof fuel to saidprime mover, and means operable upon rendering said control meansineffective to effect operation of said fuel control means to supplyfuel to said prime mover.

6. An apparatus for conditioning a reversible prime mover for operationin either one direction orin the opposite direction comprising incombination, reversing means movable to one position to condition saidprimemover for operation in said one direction and to a second positionto condition said prime mover for operation in said opposite direction,an operators control device comprising a lever having a stop positionand being operable upon movement of said lever in one direction fromsaid stop position to effect movement of said reversing means to saidone position and in the opposite direction from said stop position toeffect movement of said reversing mean-sto said second position, delaymeans comprising structure for rendering said reversing meansnon-responsive to operation of said control device, upon movement ofsaid lever out of stop position in a direction to effect movement ofsaid reversing means, for a chosen interval of time after movement ofsaid lever out of said stop position, and means conditionableautomatically in accordance with the position of said reversing meansoperable to render said structure ineffective upon movement of saidlever from stop position in either said one direction or said oppositedirection when said reversing means is in, respectively, either said oneposition or said second position.

7. An, apparatus for conditioning a reversible prime mover for operationin either one direction or in the opposite direction and for alsocontrolling the supply of fuel to said prime mover comprising incombination, reversing means, fuel control means, reversing controlmeans operable upon supply of fiuid at a chosen pressure to one chamberto effect operation of said reversing means to condition said primemover for operation in one direction and to also effect operation ofsaid fuel control means to supply fuel to said prime mover for operatingsame, and operable upon supply of fluid at a like pressure to anotherchamber to effect operation of said reversing means to condition saidprime mover for operation in the reverse direction and to als sn eroperation or said ruei control means to supply fuel to said prime moverfor operating samesaid reversing controlmeans being beer: ableup'on areduction in pres-sure of fluid in either one of said chambers to belowsaid chosen degree with fluid under pressure released from" th' otherchamber to effect operation of said fuel control means to cut on thesupply of ma to said prime mover, an operator's control de'-'- vicecomprising a lever, and means controlled bysaid lever and operable in astop position" th'i'eof to release fluid under pressure from both ofsaid chambers, and in a second position or said lever to supply fluidunder pressure tofonej or s'aidshatters and to release'fluid' underpressure from the other chamber and in a third position of said lever tosupply fluidunder pres? sure to said other chamber and to release fluidunder pressure from said one ehambe delay means arranged to controlthsupply of fluid under" pressure to said chambers and comprising meansoperable to V obtaining said chosen pressureof fluid in said one chamberupon movement of said lever from said secondposition to said thirdposition, and; in said other chamber upon movement" of said level fromsaid third position to said second position; and: means conditionable byfluid inf each chamber-at a A pressure not less than said chosen"-pressure w render the delay means ineffective for the respective chamberand efie'ctive for the other chamber. V p

'8. An apparatus for conditioning a reversible prime movrfor operationin either one direction r 01 in the" opposite direction comprising incom'- bination, reversing control means operable upon supply of fluid ata chosen pressure to one chain br to condition said prime mover foroperation in one direction and operable upon supply of fluidat a chosenpressure to a second chamber to condition said prime mover for operationin the reverse direction, an op'erator'sco'ntrol device comprising alever and operable with said lever in a stop position to release fluidunder pressure from both of said chambers, and in a second position tosupply fluid under pressure to said one chamber and to release fluidunder pressure from said other chamber, and in a third position tosupply fluid under pressure to said other chamber and to rel'ease fluidunder pres sure from said one chamber, delay means for each of saidchambers operable to delay for an' interval of timeobtaining the saidchosen pres sure of fluid therein,- and inans operable by}fiiiidsupplied to eachchamber at a pressure not lessthansaid chosenpressure to render tl erefspect'ive delay means ineffective; andoperable to render the last named delay means efiective upon supply offluid to the other chamber at a pressure not less than the 'said chosenpressure.

9.'An apparatus for conditioning a reversible prime mover tor operationinf either one dire'c j men or in the opposite direction comprising incombination, reversing control means for said prime mover operable uponsupply Oflflllid at'a' chosen pressure to one chamber to'conditionsaidprime mover for operation-inonedi'rection'and operabluponsupply of fluidat a chosen'pres sure'to a se'cond chamber to co'iiditioiis'aidprimemover for operation in the reverse direction; an perator control" devicecomprising a lever and-operable with said lever in a'stop'position toreleaseifluid under pressure from both of'sa'id chambers? and if! 8;Second position to supply delay for an interval of time eerie-so fluidun er pressure as safid one chamber and to release new under pressurerom said other chamber,- and in a third position to supply fluid underpressure to said other chamber and to re lease fluid tinderpressureirol'n' said one chairib'er; deiay means for each of said chambers opeabie to delay for an interval or time obtain ng the said chosen pressureor fluid therein, an means" operable automatically, upon conditioniiigor said prime mover for operation by fluid under pressure supplied toeither one of said chambers; to render the delay means for the lastn'amed chamber ineffective and the other delay means enective. A r

l0. An apparatus forcoii'ditioning a reversible prime mover foroperation in either one direc tibn' or in the opposite direction, comrising in coriibinatioxi, a reversing piston movable to' one positionupon supply of fluid under pressure to one chamber to condition saidprime mover for operation in one direction and movable to a sec- 0ndposition: upon supply of fluid under pressure to a second chamber tocondition said prime mover for operation in' the reverse direction; an

1 operator's control devi'ce'comprising a lever and operable uponmovement of said lever to a stop position to effect a release of fluidunder pressure from both of said chambers", to a second position toeffect a supply of fluid under pressure to saidoneichambertand to athird position: to eifect a supply of fluid under pressure to saidsecond; chamber and being operable with said lever in said: second andthird positions to efiect a releaseof fluid under pressure from thechamber not being supplied: with fluid under pressure, delay means foreachof said. chambers arranged to control.the supply of fluid underpressure thereto and being operable to prevent; for an' interval of timeafter movement of said lever from said second; positionto'said thirdposition; or vice versa; the supply of fluid under pres-' sure to therespective one of said chambers andbeing then automatically operable topermit supply ,of fluid under pressure to the respective chamber, means;operable to control said interval of time; and valve means controlled"by said'plstonand. operable in thesaid one position of said piston; torender the delay means for said one. chamber ineffecti'vezand the delaymeans for said second chamber eflective and operable in said secondpositionof said piston to render the delay, means for said secondchamber inefiective and the. delay means for said one chamber effective.

11. An apparatus for controlling operation of a reversible prime moverin either one direction or in the opposite direction, comprising.control means operable upon supply of fluid under pres sure toonepassa'ge to provide for operation of said primetmover in onedirection anduponsupply" of fluid'u'nd'er pressure; to a second passagetoprovideifor operation" or said" prime mover in the opposite directionand operable upon release of fluid under pressure from both of said pasgsages-to'render said prime mover non-operable; an operators' controldevice operable to'supply fluidunder pressure to either onev ofsaid-passages and atthe same timeyrelease fiuidunder pressure'from theother passage,-or to releasefluld under pressure from bothof saidpassagesat the same time,-delay means intr'pos'edfin the con nectidrrbetween" said control device, and said passages operable" to delaysupplyof fluid under ressure toeachof said passages by operation of" saidcontrol device toth'ereby delay for an interval of' time the operation01' said control means by such fluid pressure, and means operableautomatically in accordance with the one of said passages last suppliedwith fluid under pressure to render said delay means ineifective uponoperation of said operators control device to supply fluid underpressure to the one of said passages last supplied with fluid underpressure subsequent to operation of said control device to release fluidunder pressure from both passages.

12. An apparatus for controlling the starting, stopping and reversing ofa reversible prime mover, comprising in combination, starting means forsaid prime mover, reversing means movable to a first position tocondition said prime mover for operation in one direction and movable toa second position to condition said prime mover for operation in theopposite direction, an operators control device comprising a lever andbeing operable upon movement of said lever to a first position to efiectmovement of said reversing means to its said first position and beingoperable upon movement of said lever to a second position to effectmovement of said reversing means to its said second position, meanscontrolled by both said reversing means and operators control deviceoperable upon movement of said reversing means to the position deter- Vmined by the position of said lever to effect operation of said startingmeans to start said prime mover, brake means operable to effect stoppingof said prime mover, effective means for rendering said brake efiectiveby said control device upon movement of said lever to a third positionand also upon movement of said lever to its said first position withsaid reversin means in its said second position and upon movement ofsaid lever to its said second position with said reversing means in itssaid first position, delay means including timing structure operableupon movement of said lever from its said second position to its saidfirst position and from its said first position to its said secondposition to prevent response of said reversing means to operation ofsaid control device for a chosen interval of time after movement of saidlever, means operable upon operation of said reversing means in responseto operation of said delay means to efiect operation of said brake meansto free said prime mover for operation, and means conditionableautomatically in accordance with the position of said reversing meansfor rendering said delay means ineffective to delay response of saidreversing means to operation of said lever upon movement of said leverto its said first position with said reversing means in its said firstposition and also upon movement of said lever to its said secondposition with said reversing means in its said second position.

ROY R. STEVENS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,243,883 Ramstad June 3, 19412,288,173 Wohanka June 30, 1942 2,289,654 Keel July 14, 1942

